Replica Omega Seamaster 300 M Chronometer 212.30.41.20.01.002

Steel on steel212.30.41.20.01.002

DateThe day of the month, displayed in a window on a watch dial typically at the 3 o'clock or 6 o'clock position.

ChronometerLabel given to a watch which has undergone precision tests and received a certificate from an official body (COSC).

Helium escape valveDecompression system which allows helium to escape from inside the watch when the watch is worn for professional use in pressure chambers. (Long-term underwater work, crude oil exploration, etc.)

Screw-in crownSelf-locking crown, screwed into the tube of the case, used for highly water resistant divers' watches.

Unidirectional rotating bezelA bezel which turns in only one direction. Particularly useful for divers who cannot accidentally rotate it in the wrong direction, which could cause them to miscalculate their dive times. A rotating bezel makes it easy to measure elapsed time.